{"id":3682,"date":"2022-02-26T20:06:09","date_gmt":"2022-02-26T12:06:09","guid":{"rendered":"https:\/\/blog.coderfan.org\/?p=3682"},"modified":"2022-02-26T20:10:13","modified_gmt":"2022-02-26T12:10:13","slug":"android-camera2-architecture-analysis","status":"publish","type":"post","link":"https:\/\/blog.coderfan.org\/en\/android-camera2-architecture-analysis.html","title":{"rendered":"AndroidCamera\u8be6\u89e3\u4e00\uff1aCamera2\u6574\u4f53\u67b6\u6784\u4ecb\u7ecd"},"content":{"rendered":"
\n
\n \t<\/i> Read Time:<\/span>43 Second <\/div>\n\n <\/div>\n

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\u5728\u6b63\u5f0f\u5f00\u59cb\u4e4b\u524d\uff0c\u7b80\u5355\u8bb2\u8bb2EVS\u67b6\u6784\u4e0eCamera\u67b6\u6784\u7684\u6574\u4f53\u533a\u522b\u3002\u4ece\u67b6\u6784\u5c42\u6b21\u4e0a\u6765\u8bb2,EVS\u67b6\u6784\u7684\u5e94\u7528\u5b9e\u73b0\u5728Framework\uff08C++\uff09\u5c42\uff0c\u800cCamera\u7684\u5e94\u7528\u5b9e\u73b0\u5219\u662f\u5728\u5e94\u7528\u5c42\u3002\u7531\u4e8e\u6574\u4f53\u5c42\u6b21\u504f\u4f4e\uff0c\u4f7f\u5f97EVS\u67b6\u6784\u5177\u6709\u66f4\u5feb\u7684\u54cd\u5e94\u901f\u5ea6\u3002\u5728\u67d0\u4e9b\u8981\u6c42\u5feb\u901f\u542f\u52a8\u7684\u573a\u666f\u4e0b\uff08\u5982\u5feb\u901f\u5012\u8f66\u7b49\uff09\uff0cEVS\u67b6\u6784\u5177\u6709\u5929\u7136\u7684\u4f18\u52bf\u3002\u5f53\u7136\uff0cEVS\u7684\u7f3a\u70b9\u4e5f\u5f88\u660e\u663e\uff0c\u7531\u4e8e\u5c42\u6b21\u8f83\u4f4e\uff0c\u5bfc\u81f4\u65e0\u6cd5\u5145\u5206\u5229\u7528Android\u7cfb\u7edf\u7684\u4fbf\u5229\u6027\uff0c\u5bfc\u81f4\u57fa\u4e8eEVS\u67b6\u6784\u7684\u5e94\u7528\u5728\u5b9e\u73b0\u590d\u6742\u7684UI\u754c\u9762\u4e0a\u4f1a\u6bd4\u8f83\u5934\u75bc\uff0c\u540c\u65f6EVS\u67b6\u6784\u4e5f\u65e0\u6cd5\u652f\u6491\u66f4\u4e3a\u590d\u6742\u7684\u6444\u50cf\u5934\u5e94\u7528\uff0c\u5982\u95ea\u5149\u706f\u3001\u53c2\u6570\u8c03\u8282\u7b49\u7279\u6027EVS\u67b6\u6784\u662f\u4e0d\u652f\u6301\u7684\u3002\u8fd9\u5c31\u662f\u4e24\u79cd\u6444\u50cf\u5934\u5e94\u7528\u67b6\u6784\u7684\u4e0d\u540c\u3002<\/p>\n\n\n\n

\u7b80\u5355\u5bf9\u6bd4\u4e86EVS\u67b6\u6784\u4e0eCamera\u67b6\u6784\u7684\u4f18\u52a3\u70b9\u540e\uff0c\u6211\u4eec\u6765\u4e86\u89e3\u4e00\u4e0bCamera2\u7684\u6574\u4f53\u67b6\u6784\u3002<\/p>\n\n\n\n

\u5173\u4e8eAndroid Camera2\u7684\u6574\u4f53\u4ecb\u7ecd\uff0c\u53ef\u4ee5\u53c2\u8003\u8c37\u6b4c\u5b98\u65b9\u4ecb\u7ecd\u6587\u6863<\/a>\u3002\u8fd9\u91cc\u6682\u4e14\u5c31\u5c06\u5b98\u65b9\u7684\u67b6\u6784\u56fe\u8d34\u5728\u8fd9\u91cc\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u9488\u5bf9\u8fd9\u4e2a\u67b6\u6784\u56fe\uff0c\u6211\u4eec\u7b80\u5355\u7406\u89e3\u4e00\u4e0b\uff1a<\/p>\n\n\n\n

1\uff09Java Applicaiton\uff1a\u5e94\u7528\u5c42\u4e0a\u662f\u5404\u4e2a\u72ec\u7acb\u7684App\uff0c\u65e0\u8bba\u662fActivity\u4e5f\u597d\u8fd8\u662fService\u4e5f\u597d\uff0c\u5411\u4e0b\u9700\u8981\u63a5\u5165CameraManager\uff0c\u901a\u8fc7CameraManager\u63a5\u5165CameraService\u3002<\/p>\n\n\n\n

2\uff09Framework\uff08Java\uff09\uff1a\u8fd9\u4e00\u5c42\u5c31\u662fCameraManager\u6574\u4f53\u5b9e\u73b0\u7684\u5730\u65b9\uff0c\u6e90\u7801\u8def\u5f84\u4f4d\u4e8eframworks\/base\/core\/java\/android\/hardware\/camera2\u76ee\u5f55\u4e0b\u3002\u6e90\u7801\u4e2d\u6bd4\u8f83\u91cd\u8981\u7684\u91cd\u8981\u7684\u7c7b\u5217\u4e3e\u5982\u4e0b\uff1a<\/p>\n\n\n\n

CameraManager.java\uff1a<\/em><\/strong>CameraMnager\u7c7b\u4f5c\u4e3a\u5e94\u7528APP\u8fde\u63a5\u5230Camera\u670d\u52a1\u7684\u5165\u53e3\uff0c\u7528\u4e8e\u68c0\u6d4b\u3001\u914d\u7f6e\u4ee5\u53ca\u8fde\u63a5\u5230CameraDevice\uff0c\u5728CameraManager\u542f\u52a8\u65f6\uff0c\u5176\u4f1a\u4f7f\u7528camera\u5b57\u6bb5\u4f5c\u4e3acontext\u6ce8\u518c\u5230Binder\u5185\uff0c\u5e94\u7528\u60f3\u8981\u8fde\u63a5\u5230CameraManager\u65f6\uff0c\u901a\u8fc7getSystemService\u4f20\u5165\u8be5\u5b57\u6bb5\u5373\u53ef\u3002<\/p>\n\n\n\n

CameraDevice.java\uff1a<\/em><\/strong>CameraDevice\u7c7b\u662f\u8fde\u63a5\u5230\u5b89\u5353\u7cfb\u7edf\u7684\u6444\u50cf\u5934\u8bbe\u5907\u5728Java\u5c42\u7684\u5b9e\u5217\u4ee3\u8868\uff0c\u4e3a\u5e94\u7528\u63d0\u4f9b\u9488\u5bf9\u5177\u4f53\u6444\u50cf\u5934\u8bbe\u5907\u7684\u7ba1\u7406\uff0c\u6bcf\u4e2a\u72ec\u7acb\u7684CameraDevice\u5c06\u4ee5CameraId\u505a\u4e3a\u533a\u5206\u3002<\/p>\n\n\n\n

CameraCaptureSession.java<\/em><\/strong>:CameraCaptureSession\u7c7b\u662f\u9488\u5bf9\u67d0\u4e2a\u5177\u4f53\u7684CameraDevice\u6355\u83b7\u5185\u5bb9\u7684\u7ba1\u7406\u5bf9\u8c61\uff0c\u540c\u4e00\u4e2aCameraDevice\u53ef\u4ee5\u6709\u591a\u4e2aCameraCaptureSession.\u521b\u5efaCaptrueSession\u65f6\u9700\u8981\u4f20\u5165\u76f8\u5e94\u7684Surface\u754c\u9762\uff0c\u8c03\u7528\u65b9\u5c06\u83b7\u5f97\u4e0e\u8be5Surface\u5bf9\u5e94\u7684\u4e00\u4e2aStramId.<\/p>\n\n\n\n

CameraCaptureRequest.java<\/em><\/strong>:CameraCaptureRequest\u7c7b\u7528\u4e8e\u5728\u521b\u5efa\u5b8cCamerCaptureSession\u540e\u9488\u5bf9\u56fe\u50cf\u8f93\u51fa\u7279\u5b9a\u683c\u5f0f\u7684\u7ba1\u7406\u3002\u5728\u521b\u5efaCaptureRequest\u65f6\u9700\u8981\u4f20\u5165\u6a21\u677f\u7c7b\u578b\u4ee5\u8868\u660e\u5e94\u7528\u7c7b\u578b\u3002\u76ee\u524d\u652f\u6301\u7684\u6a21\u677f\u5305\u62ecTEMPLATE_PREVIEW\uff0cTEMPLATE_STILL_CAPTURE\uff0cTEMPLATE_RECORD\u4ee5\u53caTEMPLATE_VIDEO_SNAPSHOT,TEMPLATE_ZERO_SHUTTER_LAG\uff0cTEMPLATE_MANUAL<\/em>.<\/p>\n\n\n\n

3 \uff09AIDL:CameraManager\u9700\u8981\u8fde\u63a5\u5230Framework Native\u5c42\u7684CameraService\uff0c\u8fde\u63a5\u7684\u6865\u6881\u5c31\u662f\u901a\u8fc7AIDL\u6240\u5b9a\u4e49\u7684Binder\u901a\u4fe1\u63a5\u53e3\u3002Camera2\u6240\u5b9a\u4e49\u7684AIDL\u63a5\u53e3\u4f4d\u4e8eframeworks\/av\/camera\/aidl\/android\/hardware<\/strong>\u6587\u4ef6\u5939\u5185\u3002<\/p>\n\n\n\n

4 \uff09Framework(C++):Camera2\u67b6\u6784\u7684\u6838\u5fc3\u5c31\u662f\u4f4d\u4e8eNative\u5c42\u7684CameraService\uff0c\u5176\u4ee3\u7801\u76ee\u5f55\u4f4d\u4e8eframeworks\/av\/camera\u6587\u4ef6\u5939\u4e0b\u3002\u5728\u8fd9\u4e00\u5c42\uff0c\u4e3b\u8981\u5206\u4e3a\u4e24\u90e8\u5206\uff0c\u4e00\u90e8\u5206\u662fcamera server\uff0c\u4f5c\u4e3acameraservice\u542f\u52a8\u7684\u5165\u53e3\uff0c\u8fd8\u5305\u542b\u4e86rc\u542f\u52a8\u5f15\u5bfc\u6587\u4ef6.\u53e6\u4e00\u90e8\u5206\u5219\u662flibcameraservice\uff0c\u7ecf\u7cfb\u7edf\u7f16\u8bd1\u540e\u4f1a\u751f\u6210libcameraservice.so\u5e93\uff0c\u7531camera server\u8fdb\u884c\u52a0\u8f7d\u542f\u52a8\u3002<\/p>\n\n\n\n

5\uff09HAL:CameraService\u5e76\u4e0d\u80fd\u76f4\u63a5\u4e0e\u9a71\u52a8\u8fdb\u884c\u4ea4\u4e92\uff0c\u9700\u8981\u901a\u8fc7HAL\u5c42\u7684Camera Hal\u5b8c\u6210\u5bf9\u6444\u50cf\u5934\u7684\u5177\u4f53\u7ba1\u7406\u884c\u4e3a\u3002\u4e0eCameraManager\u8fde\u63a5CameraService\u7c7b\u4f3c\uff0cCameraService\u5c06\u901a\u8fc7Binder\u901a\u4fe1\u8c03\u7528Camera Hal\u7684\u63a5\u53e3,\u8fd9\u90e8\u5206\u7684\u63a5\u53e3\u5b9a\u4e49hidl\u6587\u4ef6\u4f4d\u4e8ehardware\/interfaces\/camera\/\u5185\u3002<\/p>\n\n\n\n

\u4ee5\u4e0a\u5c31\u662fAndroid\u7cfb\u7edfCamera2\u67b6\u6784\u7684\u4e00\u4e2a\u7b80\u5355\u4ecb\u7ecd\u4e86\uff0c\u603b\u4f53\u6765\u8bf4Camera2\u8fd9\u5957\u67b6\u6784\u8fd8\u662f\u76f8\u5f53\u590d\u6742\u7684\uff0c\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0\u5148\u53ea\u505a\u67b6\u6784\u4ecb\u7ecd\uff0c\u540e\u7eed\u6211\u4eec\u518d\u6162\u6162\u6df1\u5165\u8fdb\u884c\u8865\u5145\u5427~<\/p>\n

\n
\n \n
\n \n \"Happy\"\n <\/a>\n
\n Happy <\/div>\n
\n 2<\/span>\n \n 100<\/span> %<\/span>\n <\/div>\n <\/div>\n\n
\n \n \"Sad\"\n <\/a>\n
\n Sad <\/div>\n
\n 0<\/span>\n 0<\/span> %<\/span>\n <\/div>\n <\/div>\n\n
\n \n \"Excited\"\n <\/a>\n
\n Excited <\/div>\n
\n 0<\/span>\n 0<\/span> %<\/span>\n <\/div>\n <\/div>\n\n
\n \n \"Sleepy\"\n <\/a>\n
\n Sleepy <\/div>\n
\n 0<\/span>\n \n 0<\/span> %<\/span>\n <\/div>\n <\/div>\n\n
\n \n \"Angry\"\n <\/a>\n
Angry<\/div>\n
\n 0<\/span>\n 0<\/span> %<\/span>\n \n <\/div>\n <\/div>\n\n
\n \n \"Surprise\"\n <\/a>\n
Surprise<\/div>\n
\n 0<\/span>\n 0<\/span> %<\/span>\n <\/div>\n <\/div>\n\n <\/div>\n <\/div>","protected":false},"excerpt":{"rendered":"

\u4e00\u7bc7\u5173\u4e8eAndroid Camera2\u7cfb\u7edf\u7684\u67b6\u6784\u4ecb\u7ecd\uff0c\u540e\u7eed\u6211\u4eec\u518d\u6df1\u5165\u5427~<\/p>","protected":false},"author":1,"featured_media":3796,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":1,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[18],"tags":[46,55],"class_list":["post-3682","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-operating-system","tag-android","tag-camera2"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[]}},"aioseo_notices":[],"featured_image_urls":{"full":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1.png",1200,787,false],"thumbnail":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-150x150.png",150,150,true],"medium":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-300x197.png",300,197,true],"medium_large":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-768x504.png",768,504,true],"large":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-1024x672.png",1024,672,true],"1536x1536":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1.png",1200,787,false],"2048x2048":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1.png",1200,787,false],"trp-custom-language-flag":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-18x12.png",18,12,true]},"post_excerpt_stackable":"

\u4e00\u7bc7\u5173\u4e8eAndroid Camera2\u7cfb\u7edf\u7684\u67b6\u6784\u4ecb\u7ecd\uff0c\u540e\u7eed\u6211\u4eec\u518d\u6df1\u5165\u5427~<\/p>\n","category_list":"\u64cd\u4f5c\u7cfb\u7edf<\/a>","author_info":{"name":"FranzKafka95","url":"https:\/\/blog.coderfan.org\/en\/author\/yushenglonely95"},"comments_num":"0 comments","featured_image_urls_v2":{"full":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1.png",1200,787,false],"thumbnail":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-150x150.png",150,150,true],"medium":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-300x197.png",300,197,true],"medium_large":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-768x504.png",768,504,true],"large":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-1024x672.png",1024,672,true],"1536x1536":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1.png",1200,787,false],"2048x2048":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1.png",1200,787,false],"trp-custom-language-flag":["https:\/\/blog.coderfan.org\/wp-content\/uploads\/2022\/02\/best-android-camera-1-18x12.png",18,12,true]},"post_excerpt_stackable_v2":"

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